~Illness~

Adult Medical–Surgical Nursing: Chronic Illness & Interconnected Body Systems — Master Study Guide

Core Concepts (EXAM FOUNDATION)

  • Chronic illness affects multiple body systems simultaneously

  • Body systems are interconnected → dysfunction in one system can cascade

  • Disruption of homeostasis → illness, complications, or death

  • Nurses must assess the whole client, not just one diagnosis

  • Nursing roles: Monitor, educate, advocate, coordinate care

Nursing Process (MEMORIZE ORDER):

  1. Recognize cues (Assessment)

  2. Analyze cues

  3. Prioritize hypotheses

  4. Generate solutions

  5. Implement actions

  6. Evaluate outcomes

Illness Prevention Levels:

  • Primordial: Healthy environment

  • Primary: Vaccines, lifestyle modifications

  • Secondary: Screenings

  • Tertiary: Reduce complications

  • Quaternary: Prevent overmedicalization

Homeostasis

  • Definition: Dynamic equilibrium of body systems

  • Health = balance; Illness = imbalance

  • Example: Hypovolemia → ↓ perfusion → AKI → multi-organ failure

Nursing Role: Monitor perfusion, fluids, electrolytes, oxygenation; intervene early (e.g., sepsis fluid resuscitation)

Endocrine System

Purpose: Primary communication system regulating metabolism, fluid balance, blood pressure, reproduction, and glucose
Chronic dysfunction effects: Sexual dysfunction, infertility, multi-organ complications

Organs affected: Eyes, kidneys, nerves, muscles, menstrual cycle, metabolism, hair

High-Yield Endocrine Disorders

Disorder

Key Manifestations

Nursing/Teaching Focus

Central Diabetes Insipidus

Polyuria, polydipsia

Monitor fluids/electrolytes, daily weights

Acromegaly

Enlarged hands/feet/face, visual defects, headaches

Assess vision, hormone therapy monitoring

Hypoparathyroidism

Muscle cramps, tingling around mouth/hands

Calcium monitoring, seizure precautions

Graves’ Disease

Exophthalmos, goiter, heat intolerance, weight loss, insomnia/fatigue

Eye protection, thyroid monitoring

Addison’s Disease

Hypotension, fatigue, weight loss, abdominal pain

Monitor BP, steroid replacement education

Type 1 Diabetes Mellitus

Polyuria, polydipsia, weight loss, vision changes

Glucose monitoring, insulin therapy, diet education

Polycystic Ovarian Syndrome (PCOS)

Infertility, irregular menses, hirsutism, weight gain

Lifestyle management, reproductive counseling

Key Hormones to Highlight:

  • ACTH → cortisol

  • TSH → metabolism

  • ADH → decreases urine output

  • Oxytocin → uterine contractions

  • Cortisol → stress & glucose regulation

  • Aldosterone → sodium & fluid retention

Negative Feedback Concept: Hormone released until balance restored, then stops

  • Example: Insulin release in response to rising glucose

Gas Exchange / Respiratory System

  • Directly affects perfusion and cellular function

  • Impaired oxygen exchange → cell death → worsens cardiovascular disease

Chronic Conditions: Asthma, COPD, chronic bronchitis, lung cancer

Environmental Risks: Smoking, asbestos, infections (COVID-19, pneumonia)

Nursing Priority: Always assess respiratory AND cardiovascular status

Gastrointestinal Function

  • Pancreas links GI & endocrine systems

  • Dysfunction → carbohydrate malabsorption, blood glucose dysregulation

Chronic Pancreatic Disease:

  • Malabsorption → malnutrition, vitamin deficiencies

  • Management: Controlled diet, vitamin supplementation, pancreatic enzymes

Other Malabsorption Disorders:

  • Celiac disease, pernicious anemia, cystic fibrosis, chronic pancreatitis

Hematologic System

RBCs: Oxygen delivery → perfusion

  • Anemia → ↓ oxygen → fatigue, hypoxia

  • Causes: Blood loss, bone marrow failure, RBC destruction

Sickle Cell Disease:

  • Vaso-occlusion → severe pain, vision changes, pulmonary complications

  • Crisis Prevention (HIGH-YIELD):

    • Increase hydration

    • Avoid extreme heat or cold

    • Take hydroxyurea

    • Avoid high altitudes & smoking

    • Treat infections early

    • Manage stress

WBCs: Immunity

  • Leukocytosis → stroke, MI, multi-organ failure

  • Leukopenia → high infection risk, can be fatal

Platelets: Clotting

  • Thrombocytosis → stroke, MI, VTE risk

  • Thrombocytopenia → internal bleeding, intracerebral hemorrhage

Inflammation & Immunity

  • Chronic illness ↑ infection risk

  • Vaccinations critical: Flu, COVID-19

  • Microbiome supports immunity; disrupted by antibiotics, diet changes

  • Probiotics (Lactobacillus) → prevent C. diff

Mobility

  • Any movement > no movement

  • Immobility effects:

System

Effect

Cardiac

Venous stasis, orthostatic hypotension

Respiratory

Atelectasis, pneumonia

Musculoskeletal

Muscle wasting, contractures

Skin

Pressure injuries

Psychological

Depression

Nursing Interventions: Early ambulation, frequent repositioning, remove barriers to mobility

Nervous System

  • Controls sensation, movement, cognition, emotion

  • Chronic illness → cognitive decline

  • Vision & hearing loss ↑ fall risk

  • Assess sensory function for safety

Perfusion / Cardiovascular

  • Leading cause of death in Type 2 Diabetes

  • Complications: Heart disease, stroke, kidney failure, neuropathy, vision loss, sexual dysfunction, depression/dementia

Sexual Function

  • Impaired by: Diabetes, CVD, smoking, obesity

  • Nursing education: Exercise, smoking cessation, healthy diet, stress management

Tissue Integrity / Skin

  • Immobility + pressure → skin breakdown → infection → sepsis

  • Hand hygiene, frequent assessment, repositioning

Lifestyle & Risk Factors

  • Decreased physical activity

  • Poor nutrition → high-fat, high-sugar diets worsen chronic illness

  • Tobacco → leading preventable cause of death; vaping NOT safe

  • Alcohol → ↑ liver disease risk; interferes with medication metabolism; use SBIRT (Screening, Brief Intervention, Referral to Treatment)

Exercise Benefits: Improves diabetes, hypertension, obesity, depression
Nutrition Teaching: Label reading, culturally appropriate choices

Mental Health & Cognition

  • Chronic illness ↑ anxiety, depression, cognitive decline

  • Care plans must integrate mental health and cognitive support

  • Interprofessional collaboration is essential

Social Determinants of Health (SDOH)

  • Domains: Economic stability, health care access & quality, neighborhood/built environment, social/community context

  • Strongly influence chronic illness outcomes

  • Nursing role: Advocacy, education, community engagement, avoid implicit bias

Motivational Interviewing

  • Empathy

  • Support self-efficacy

  • Roll with resistance

  • Develop discrepancy

  • Use client’s own words to set goals

Big Exam Takeaways

  • Chronic illness = multisystem

  • Homeostasis disruption drives complications

  • Nurses monitor, educate, advocate, coordinate care

  • SDOH can be as important as medications

  • High-yield tables/checklists (Sickle Cell, Endocrine Disorders, Immobility Effects) are must-know

So this bottom half is a little more detailed in case you want more detailed information 🙂 ( It may repeat a lot because it’s a lot of information, just explained differently)

Core Concept (EXAM FOUNDATION)

  • Chronic illness affects multiple body systems simultaneously

  • Body systems are interconnected

  • Disruption of homeostasis leads to illness, complications, or death

  • Nurses must assess the whole client, not just one diagnosis

Endocrine Function

  • Primary communication system of the body

  • Regulates:

    • Metabolism

    • Fluid balance

    • Blood pressure

    • Reproduction

  • Chronic dysfunction can cause sexual dysfunction and infertility

  • Endocrine disorders often affect:

    • Eyes, kidneys, nerves, muscles, menstrual cycle, metabolism, hair

Key Endocrine Disorders & Manifestations (HIGH YIELD)

  • Central Diabetes Insipidus (Hypothalamus)

    • Polydipsia

    • Polyuria

  • Acromegaly (Pituitary)

    • Enlarged hands, feet, face

    • Visual field defects

    • Headaches

  • Hypoparathyroidism

    • Muscle cramps

    • Tingling around mouth and hands

    • Graves’ Disease

      • Exophthalmos

      • Goiter

      • Heat intolerance

      • Weight loss

      • Insomnia & fatigue

    • Addison’s Disease

      • Hypotension

      • Weight loss

      • Fatigue

      • Abdominal pain

    • Type 1 Diabetes Mellitus

      • Polyuria

      • Polydipsia

      • Weight loss

      • Vision changes

    • Polycystic Ovarian Syndrome (PCOS)

      • Infertility

      • Irregular menses

      • Hirsutism

      • Weight gain

    Gas Exchange / Respiratory

    • Gas exchange directly affects perfusion

    • Impaired oxygen exchange → cell death

    • Can worsen cardiovascular disease

    • Nursing priority:

    • Assess respiratory AND cardiovascular status in all clients

Gastrointestinal Function

  • Pancreas links GI and endocrine systems

  • Dysfunction causes:

    • Impaired carbohydrate digestion

    • Blood glucose dysregulation

Chronic Pancreatic Disease

  • Malabsorption

  • Poor glucose control

  • Requires:

    • Controlled diet

    • Vitamin supplementation

    • Pancreatic enzymes

Malabsorption Worsens Chronic Illness

Seen in:

  • Celiac disease

  • Pernicious anemia

  • Cystic fibrosis

  • Chronic pancreatitis

Hematologic Function

Red Blood Cells

  • Anemia

    • ↓ Oxygen delivery

    • Impaired perfusion

    • Causes: blood loss, bone marrow failure, RBC destruction

  • Sickle Cell Disease

    • Abnormal sickle-shaped RBCs

    • Causes:

      • Severe pain

      • Vision impairment

      • Pulmonary complications

Preventing Sickle Cell Crisis (VERY TESTABLE)

  • Increase hydration

  • Avoid extreme heat or cold

  • Take hydroxyurea

  • Avoid high altitudes

  • Do not smoke

  • Treat infections early

  • Manage stress

White Blood Cells

  • Leukocytosis

    • Risk for stroke, MI, multi-organ failure

  • Leukopenia

    • High infection risk

    • Can lead to death

Platelets

  • Thrombocytosis

    • Stroke, MI, VTE risk

  • Thrombocytopenia

    • Internal bleeding

    • Intracerebral hemorrhage can be fatal

Homeostasis

  • Dynamic equilibrium

  • Health = balance

  • Illness = imbalance

Example:

  • Hypovolemia → ↓ perfusion → AKI → multi-organ failure

Inflammation & Immunity

  • Chronic illness ↑ infection risk

  • Vaccinations (flu, COVID-19) are critical

Microbiome

  • Supports immunity

  • Disrupted by:

    • Antibiotics

    • Diet changes

  • Probiotics (Lactobacillus) prevent C. diff

Mobility

  • Immobility worsens outcomes

  • Any movement > no movement

Effects of Immobility

  • Cardiac: Venous stasis, orthostatic hypotension

  • Respiratory: Atelectasis, pneumonia

  • Musculoskeletal: Muscle wasting, contractures

  • Skin: Pressure injuries

  • Psychological: Depression

Nervous System

  • Vision & hearing loss increase fall risk

  • Assess sensory function for safety

Perfusion / Cardiovascular

  • Leading cause of death in type 2 diabetes

Complications of Type 2 Diabetes

  • Heart disease & stroke

  • Kidney failure

  • Neuropathy

  • Vision loss

  • Sexual dysfunction

  • Depression & dementia

Sexual Function

  • Impacted by:

    • Diabetes

    • CVD

    • Smoking

    • Obesity

  • Nursing education:

    • Exercise

    • Smoking cessation

    • Healthy diet

    • Stress management

Tissue Integrity

  • Immobility + pressure → skin breakdown

  • Can lead to:

    • Infection

    • Sepsis

  • Meticulous hand hygiene

Nursing Process (MEMORIZE ORDER)

  1. Recognize cues (Assessment)

  2. Analyze cues

  3. Prioritize hypotheses

  4. Generate solutions

  5. Implement actions

  6. Evaluate outcomes

Illness Prevention

  • Primordial: Healthy environment

  • Primary: Vaccines, lifestyle

  • Secondary: Screenings

  • Tertiary: Reduce complications

  • Quaternary: Prevent overmedicalization

Client Education & SDOH

  • Consider literacy, learning style, and access

  • Avoid implicit bias

  • Client-centered, ethical care

Adult Medical-Surgical Nursing: Chronic Illness Study Guide

Learning Focus

  • Chronic illness affects multiple body systems, not just one

  • Alteration in one system can cause a cascade of dysfunction in others

  • Nurses play a central role in coordination of care, education, prevention, and advocacy

  • Social determinants of health (SDOH) significantly impact outcomes in chronic illness

Homeostasis

  • Homeostasis = the body’s ability to self-regulate and maintain internal balance

  • Maintained by hormonal, renal, respiratory, and cardiovascular systems

  • Disrupted by:

    • Disease

    • Poor perfusion

    • Fluid and electrolyte imbalance

    • Respiratory distress

  • Nursing role:

    • Monitor fluids, electrolytes, perfusion, oxygenation

    • Early fluid resuscitation in sepsis saves lives

Endocrine Function

  • Regulates metabolism, growth, stress response, reproduction, and glucose control

  • Major glands:

    • Hypothalamus – temperature, metabolism, satiety

    • Pituitary (“master gland”) – controls other glands

    • Thyroid & Parathyroid – metabolism, calcium balance

    • Pancreas – insulin ↓ glucose, glucagon ↑ glucose

    • Adrenal glands – stress response, fluid balance

    • Gonads – sex hormones

Key Hormones to Highlight

  • ACTH – stimulates cortisol

  • TSH – metabolism

  • ADH – decreases urine output

  • Oxytocin – uterine contractions

  • Cortisol – stress, glucose regulation

  • Aldosterone – sodium & fluid retention

Negative Feedback System

  • Hormones are released until balance is restored, then secretion stops

  • Examples:

    • Insulin release when glucose rises

    • Oral contraceptives prevent ovulation via negative feedback

  • Endocrine dysfunction can cause acute and chronic illness

Gas Exchange (Respiratory System)

  • Purpose: Oxygen in, carbon dioxide out

  • Chronic conditions:

    • Asthma, COPD, lung cancer, bronchitis

  • Impaired gas exchange affects all organs via hypoxia

  • Chronic hypoxia can cause:

    • Cardiac hypertrophy

    • Vessel dilation

  • Environmental risks:

    • Smoking, asbestos, infections (COVID-19, pneumonia)

Gastrointestinal (GI) Function

  • Purpose: Digestion, absorption, waste elimination

  • Accessory organs:

    • Liver – bile, drug metabolism

    • Pancreas – digestive enzymes

    • Gallbladder – bile storage

  • Unhealthy microbiome is linked to immune dysfunction and colorectal cancer

  • GI tract = 80% of body’s microbial mass

Hematologic Function

  • Blood functions:

    • Oxygen transport

    • Immunity

    • Clotting

    • Waste removal

  • Components:

    • RBCs (oxygen)

    • WBCs (immunity)

    • Platelets (clotting)

    • Plasma (transport)

  • Chronic conditions:

    • Anemia, sickle cell disease, HIV, blood cancers

  • Bone marrow produces blood cells

  • Sickle cell disease causes vessel blockage, pain, hypoxia

Inflammation & Immunity

  • Innate immunity = first-line, nonspecific defense

  • Types of immunity:

    • Passive immunity – antibodies from mother or injections

    • Active immunity – body produces antibodies

  • Autoimmune disease = immune system attacks self

    • Examples: Lupus, MS, RA, type 1 diabetes

  • Stress lowers immunity

  • Nursing role: Promote healthy lifestyle, stress reduction

Mobility

  • Benefits:

    • Prevents skin breakdown

    • Improves circulation

    • Maintains muscle strength

  • Risks of immobility:

    • Pressure injuries (deep tissue injury → pressure ulcer)

  • Nursing interventions:

    • Frequent repositioning

    • Early ambulation after surgery

    • Remove barriers to mobility

Nervous System

  • Controls:

    • Sensation, movement, cognition, emotion

  • Neurotransmitters:

    • Excitatory – acetylcholine, glutamate

    • Inhibitory – GABA, endorphins

    • Modulatory – serotonin, dopamine

  • Chronic conditions:

    • Stroke, Parkinson’s, dementia, MS

  • Cognitive decline requires ongoing assessment

Perfusion

  • Perfusion = delivery of oxygenated blood to tissues

  • Impaired by:

    • Atherosclerosis

    • Clots

    • Heart failure, shock, arrhythmias

  • Poor perfusion leads to organ failure

Sexual Function

  • Affected by:

    • Chronic illness

    • Poor perfusion

    • Endocrine disorders

    • Medications (SSRIs, antihypertensives, hormones)

  • Nurses must assess sexual health sensitively

Tissue Integrity (Skin)

  • Functions:

    • Protection, temperature regulation, sensation

  • Risk factors for breakdown:

    • Immobility, poor nutrition, incontinence

  • Skin assessment differs with darker skin tones (nonblanchable)

  • Nursing role: Frequent skin checks, repositioning

Chronic Illness Risk Factors

  • Decreased physical activity

  • Poor nutrition

  • Tobacco, alcohol, substance use

Exercise

  • Improves diabetes, hypertension, depression, obesity

  • Encourage gradual, safe activity

Nutrition

  • High-fat, high-sugar diets worsen chronic illness

  • Teach label reading and culturally appropriate nutrition

Tobacco Use

  • Leading cause of preventable death

  • Vaping is NOT safer

  • Nursing role: Ask every visit, support quitting

Alcohol Use

  • Increases liver disease risk

  • Interferes with medication metabolism

  • SBIRT = screening, brief intervention, referral

Mental Health & Cognition

  • Chronic illness increases anxiety, depression, cognitive decline

  • Care plans must consider mental health and cognition

  • Interprofessional collaboration is essential

Social Determinants of Health (SDOH)

  • Domains:

    • Economic stability

    • Health care access & quality

    • Neighborhood & built environment

    • Social & community context

  • SDOH strongly influence chronic illness outcomes

  • Nursing role: Advocacy, education, community engagement

Motivational Interviewing

  • Core principles:

    • Empathy

    • Support self-efficacy

    • Overcome resistance

    • Develop discrepancy

  • Use client’s own words to set goals

Big Exam Takeaways

  • Chronic illness is multisystem

  • Homeostasis disruption drives complications

  • Nurses monitor, educate, advocate, and coordinate care

  • SDOH can be as important as medications

Big Picture Concept

  • Chronic illness rarely affects just one system

  • Body systems are interconnected, so dysfunction in one often leads to dysfunction in others

  • Loss of homeostasis leads to illness and complications

  • Nursing care must address the whole client, not one diagnosis

Endocrine Function

  • Controls communication, hormones, metabolism, fluid balance, and blood pressure

  • Chronic endocrine dysfunction can cause:

    • Sexual dysfunction and infertility

    • Multi-system effects (eyes, kidneys, nerves, muscles, menstrual cycle, metabolism, hair)

Key Endocrine Disorders & Manifestations (HIGH YIELD)

  • Central Diabetes Insipidus (Hypothalamus)

    • Polydipsia (extreme thirst)

    • Polyuria (increased urination)

  • Acromegaly (Pituitary)

    • Enlarged hands, feet, face

    • Visual field defects

    • Headaches

  • Hypoparathyroidism (Parathyroid)

    • Muscle cramps

    • Tingling around mouth and hands

  • Graves’ Disease (Thyroid)

    • Exophthalmos

    • Goiter

    • Heat intolerance

    • Weight loss

    • Insomnia & fatigue

  • Addison’s Disease (Adrenal)

    • Fatigue

    • Hypotension

    • Weight loss

    • Abdominal pain & nausea

  • Type 1 Diabetes Mellitus (Pancreas)

    • Polyuria, polydipsia, weight loss, vision changes

  • Polycystic Ovarian Syndrome (Ovary)

    • Infertility

    • Irregular menstrual cycles

    • Hirsutism

    • Weight gain

Gas Exchange / Respiratory

  • Gas exchange affects perfusion

  • Poor oxygen exchange → cell death

  • Respiratory disease can worsen cardiovascular disease

  • Nursing priority:

    • Assess respiratory AND cardiovascular status in every client

Gastrointestinal Function

  • Pancreas links GI and endocrine systems

  • Pancreatic dysfunction causes:

    • Poor carbohydrate digestion

    • Impaired insulin & glucagon secretion

Chronic Pancreatic Disease

  • Blood glucose control problems

  • Malabsorption and malnutrition

  • May require:

    • Special diet

    • Vitamin supplementation

    • Pancreatic enzyme replacement

Malabsorption Worsens Chronic Illness

  • Seen in:

    • Celiac disease

    • Pernicious anemia

    • Cystic fibrosis

    • Chronic pancreatitis

Hematologic Function

  • Blood cells maintain oxygenation, immunity, and clotting

Red Blood Cells

  • Anemia

    • Decreased oxygen delivery

    • Impaired perfusion

    • Causes: blood loss, bone marrow failure, RBC destruction

  • Sickle Cell Disease

    • Sickle-shaped RBCs clog vessels

    • Causes:

      • Pain

      • Vision impairment

      • Pulmonary complications

Preventing Sickle Cell Crisis (VERY TESTABLE)

  • Increase hydration

  • Avoid extreme temperatures

  • Take hydroxyurea as prescribed

  • Avoid high altitudes

  • Do not smoke

  • Treat infections early

  • Manage stress

White Blood Cells

  • Leukocytosis

    • Can cause stroke, MI, multi-organ failure

  • Leukopenia

    • Increased infection risk

    • Can lead to death

Platelets

  • Thrombocytosis

    • Risk for stroke, MI, VTE

  • Thrombocytopenia

    • Risk for internal bleeding

    • Intracerebral hemorrhage can be fatal

Homeostasis

  • Dynamic equilibrium within narrow limits

  • Health = homeostasis

  • Illness = disruption of homeostasis

Example:

  • Hypovolemia → decreased perfusion → kidney injury → multi-organ failure

Inflammation & Immunity

  • Chronic illness increases infection risk

  • Vaccinations (influenza, COVID-19) are critical

Microbiome

  • Gut microbiome supports immunity

  • Disruption caused by:

    • Antibiotics

    • Diet changes

  • Probiotics (Lactobacillus) help prevent C. diff

Mobility

  • Immobility worsens chronic illness

  • Any movement is better than none

Effects of Immobility

  • Cardiovascular: Venous stasis, orthostatic hypotension

  • Respiratory: Atelectasis, pneumonia

  • Musculoskeletal: Muscle wasting, contractures

  • Integumentary: Pressure injuries

  • Psychological: Depression, isolation

Nervous System

  • Vision and hearing loss increase fall risk

  • Nurses must assess sensory function for safety

Perfusion / Cardiovascular

  • Cardiovascular disease is the leading cause of death in type 2 diabetes

Complications of Type 2 Diabetes

  • Heart disease, stroke, hypertension

  • Kidney failure

  • Neuropathy

  • Vision loss

  • Sexual dysfunction

  • Depression & dementia

Sexual Function

  • Affected by:

    • Diabetes

    • Cardiovascular disease

    • Smoking

    • Obesity

Nursing education:

  • Encourage smoking cessation

  • Exercise 30 minutes daily

  • Healthy diet

  • Stress management

Tissue Integrity

  • Immobility + pressure = skin breakdown

  • Can lead to:

    • Infection

    • Sepsis

  • Meticulous hand hygiene is essential

Nursing Process (EXAM FAVORITE)

  1. Recognize cues (Assessment)

  2. Analyze cues

  3. Prioritize hypotheses

  4. Generate solutions

  5. Take action

  6. Evaluate outcomes

Illness Prevention

  • Primordial: Healthy environment for entire population

  • Primary: Vaccinations, healthy lifestyle

  • Secondary: Screenings & early detection

  • Tertiary: Treat chronic illness to reduce complications

  • Quaternary: Prevent overmedicalization

Client Education & SDOH

  • Education must consider:

    • Health literacy

    • Learning preferences

    • Social determinants of health

  • Avoid implicit bias

  • Client-centered care is ethical nursing practice

Key Takeaways (FINAL EXAM STYLE)

  • Chronic illness affects multiple systems

  • Systems are interconnected

  • Use the nursing process for all care

  • Prevention, education, and interprofessional collaboration are essential